byte redPin = 3;
byte greenPin = 4;
byte yellowPin = 5;

void setup() {
  // put your setup code here, to run once:
  pinMode(redPin, OUTPUT);
  pinMode(greenPin, OUTPUT);
  pinMode(yellowPin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(redPin, HIGH);
  delay(5000);
  digitalWrite(redPin, LOW);

  digitalWrite(greenPin, HIGH);
  delay(10000);
  digitalWrite(greenPin, LOW);

  digitalWrite(yellowPin, HIGH);
  delay(2000);
  for (int i; i < 10; i++) {
    digitalWrite(yellowPin, HIGH);
    delay(250);
    digitalWrite(yellowPin, LOW);
    delay(250);
  }
}